Muffler for internal-combustion engines



Nov. 23 1926.

H. A. scQHwAGER y MUFFLER FOR ENTERNAL COMBUSIIION ENGINES OriginalAFiled Nv. 22, 1924 lll Patented Nov. 23, r1926.

HENRY A. SCHWAGER, OF ROYAL OAK, MICHIGAN.

MUFFLER FOR INTERNAL-COMBUSTION ENGINES.

Application led November 22, 1924, Serial No. 751.707. Renewed October13, 1926.

It is the primary object of my invention to provide a muffler of thetype described, which is adapted to quickly-1 and eiliciently cool theexhaust gases passed into it and which is of economical and sturdyconstruction.

To this end, I have provided a muffler composed of a very small numberof parts so joined together as to make their 'disintegration throughusage substantially impossible.

With the above, andother objects in view, my invention consists in thearrangement, combination and construction of the various parts of myimproved device as described in the specification, claimed in my claimsand shown in the accompanying drawings, in which:

Fig. 1 is a longitudinal sectional view ot my improvedv device.

Fig. 2 is a view taken on line 2-2 of Fig. 1. V

l have shown a pair of end pieces or heads 5 and 6, to which a shell7'is secured by welding as at 8 and 9.

The shell 7 is formed of a single strip of material having itslongitudinal edges return bent and joined together as Vshown at 10 inFig. 2. The return bent edges may, if desired, be welded together. Aplurality of longitudinally extending corrugations 11 are provided onthe shell.

Extending within the shell 7 is an 'ejector tube 12 having itsdischargeend drawn to el'ect a relatively small opening 13.

A plurality of battle plates/14 are provided'having necks 15 formedthereon and adapted to engage the ejector tube 12. The necks 15 may bewelded to the tube 12 in order to assist| in securing the baii'le platesin place.

The outer peripheries of the plates 14 are flanged as at 16, the flangesbeing adapted to engage the bottoms of the corrugations 11 and arewelded thereto in order to secure them against displacement.

The number of baiile plates utilized and the positioning of the samealong the ejector -tube 12 is determined by the piston displace ment ofthe motor whichthe Vmuffler is intendedto serve.

Exhaust gases will be passed into the mufthrough the openings effectedby the corrugations 11, out through vthe head 6 and the opening 17therein;

Thus it will be readily 'seen that the gases are e-il'ectually cooledaround the inner periphery of the shell 7 with the corrugations 11acting as radiators.

It will be obvious that various changes may be made in the arrangement,combination and construction of the various parts of my improved devicewithout departing from the spirit of my invention. Particularly changesinthe assembly ot my improved de-Y vice may be made, as well as changesin the location of the various parts to accommodate various types andsizes of engines, to which the muiiler is assembled. It is my intentionto. cover by my claims such changes as may be reasonably included withinthe scope of my invention.

What I claim is:

1. A muliler of the class described comprising a gas receiving openingand a discharge opening, .a corrugated shell between said openings, aplurality of baffle plates in said shell, said plates having portionsthereof positioned against the inner ridges of said co'rrugations, andmeans extending through said plates to a point adjacent said dischargeopening adapted to receive some of the gases and to create a vacuum,whereby the remaining gases may be drawn around the inner periphery ofsaid corrugated shell.

2. A 'muiller of the class described `comprising'a gas receiving openinand a discharge opening, a corrugated s ell between said openings, atube in said .shell having a contracted opening adjacent said dischargeopening, a plurality of baille lates in said shell having aperturestherein t ough which said tube extends, a portion of each plate engagngsaid tube and another portion thereof engagln the inner ridges of saidcorrugatons, W ereby gases may pass through the valleys of saidcorrugations.

3. A muler of the class described comprising a gas receiving opening anda discharge opening, a corrugated shell between said openings, a tube insaid shell having a,

contracted opening adjacent said discharge.

shell 'having apertures therein through which said tube extends, flangeson said plates around said tube and flanges on said platesbearlngagalnst the ridges of said corrugations and means securing saidflanges lto l5 their bearing surfaces.

HENRY A. SCHWAGER.

